'\" te
.\"  Copyright (c) 2002, Sun Microsystems, Inc. All Rights Reserved
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
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.TH KILLPG 3C "Jul 24, 2002"
.SH NAME
killpg \- send signal to a process group
.SH SYNOPSIS
.LP
.nf
#include <signal.h>

\fBint\fR \fBkillpg\fR(\fBpid_t\fR \fIpgrp\fR, \fBint\fR \fIsig\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBkillpg()\fR function sends the signal \fIsig\fR to the process group
\fIpgrp\fR. See \fBsignal.h\fR(3HEAD) for a list of signals.
.sp
.LP
The real or effective user \fBID\fR of the sending process must match the real
or saved set-user \fBID\fR of the receiving process, unless the effective user
\fBID\fR of the sending process is the privileged user. A single exception is
the signal \fBSIGCONT\fR, which may always be sent to any descendant of the
current process.
.SH RETURN VALUES
.sp
.LP
Upon successful completion, \fB0\fR is returned. Otherwise, \fB\(mi1\fR is
returned and \fBerrno\fR is set to indicate the error.
.SH ERRORS
.sp
.LP
The \fBkillpg()\fR function will fail and no signal will be sent if:
.sp
.ne 2
.na
\fB\fBEINVAL\fR\fR
.ad
.RS 10n
The \fIsig\fR argument is not a valid signal number.
.RE

.sp
.ne 2
.na
\fB\fBEPERM\fR\fR
.ad
.RS 10n
The effective user \fBID\fR of the sending process is not privileged user, and
neither its real nor effective user \fBID\fR matches the real or saved set-user
\fBID\fR of one or more of the target processes.
.RE

.sp
.ne 2
.na
\fB\fBESRCH\fR\fR
.ad
.RS 10n
No processes were found in the specified process group.
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Standard
_
MT-Level	MT-Safe
.TE

.SH SEE ALSO
.sp
.LP
.BR kill (2),
.BR setpgrp (2),
.BR sigaction (2),
.BR signal.h (3HEAD),
.BR attributes (7),
.BR standards (7)
